<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - morph targets - horse</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

		<script src="../build/Three.js"></script>

		<script src="js/Stats.js"></script>

		<script>

			var container, stats;
			var camera, scene, projector, renderer;
			var mesh;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				var info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = '<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> webgl - morph targets - horse. model by <a href="http://mirada.com/">mirada</a> from <a href="http://ro.me">rome</a>';
				container.appendChild( info );

				//

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.y = 300;
				scene.add( camera );

				camera.target = new THREE.Vector3( 0, 150, 0 );


				//

				var light = new THREE.DirectionalLight( 0xefefff, 2 );
				light.position.set( 1, 1, 1 ).normalize();
				scene.add( light );

				var light = new THREE.DirectionalLight( 0xffefef, 2 );
				light.position.set( -1, -1, -1 ).normalize();
				scene.add( light );

				var loader = new THREE.JSONLoader( true );
				loader.load( "models/animated/horse.js", function( geometry ) {

					mesh = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: 0x606060, morphTargets: true } ) );
					mesh.scale.set( 1.5, 1.5, 1.5 );
					scene.add( mesh );

				} );

				//

				renderer = new THREE.WebGLRenderer();
				renderer.sortObjects = false;
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.appendChild(renderer.domElement);

				//

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			var radius = 600;
			var theta = 0;

			var duration = 1000;
			var keyframes = 15, interpolation = duration / keyframes;
			var lastKeyframe = 0, currentKeyframe = 0;

			function render() {

				theta += 0.2;

				camera.position.x = radius * Math.sin( theta * Math.PI / 360 );
				camera.position.z = radius * Math.cos( theta * Math.PI / 360 );

				camera.lookAt( camera.target );

				if ( mesh ) {

					// Alternate morph targets

					var time = Date.now() % duration;

					var keyframe = Math.floor( time / interpolation );

					if ( keyframe != currentKeyframe ) {

						mesh.morphTargetInfluences[ lastKeyframe ] = 0;
						mesh.morphTargetInfluences[ currentKeyframe ] = 1;
						mesh.morphTargetInfluences[ keyframe ] = 0;

						lastKeyframe = currentKeyframe;
						currentKeyframe = keyframe;

						// console.log( mesh.morphTargetInfluences );

					}

					mesh.morphTargetInfluences[ keyframe ] = ( time % interpolation ) / interpolation;
					mesh.morphTargetInfluences[ lastKeyframe ] = 1 - mesh.morphTargetInfluences[ keyframe ];

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
